This data set comprises half hourly water level, temperature, and conductivity data aggregated to the 5 min interval from two Onset Hobo U20L-04 pressure transducers (one measuring water pressure and one measuring air pressure) and one Hobo U24-001 Conductivity sensor which also measures temperature. The sensors were installed in 2017 and are typically downloaded twice per year.
This data set contains 1058805 measurements from 20-10-22 to 2023-10-12 see table 2 for a proportional breakdown of data set quality levels.
| Date | Comment |
|---|---|
| 2017-05-20 | Conductivity (SC) sensor installed |
| 2017-08-31 | Water level (PT) installed |
| 2017-12 | PT froze and clogged with sediment ~Dec 2017; data compromised intermittently |
| 2018-05 | Installation and sensors removed; sensors malfunctioned |
| 2018-07 | Sensors re-installed; new PT2 sensor installed for overlap |
| 2018-10 | PT uninstalled; PT2 continues to operate |
| 2021-05-11 | SC sensor malfunction; removed indefinitely |
| 2021-10-22 | PT2 download; re-installed upside down |
| 2021-10-22 | 11cm offset added to account for vertical change - average of height diff; sensor length = 15.74cm; sensor position = 15.74 - 1.6 cm;new sensor height = 13.72 cm |
| 2022-03-21 | PT2 re-installed in correct position; offset removed |
| 2022-10-18 | PT2 downloaded |
| 2023-04-08 | PT2 downloaded |
The following depicts the typical methodology applied to create the stream stage, and temperature time-series data package which uses 5-minute average measurements that are quality controlled (QC’d), flagged and corrected where needed (Table 1-4) outlined below:
| sensor | qflag | count |
|---|---|---|
| PT | AV | 24954 |
| PT | EV | 53983 |
| PT | SVC | 22573 |
| PT2 | AV | 278813 |
| PT2 | EV | 89484 |
| PT2 | SVC | 10553 |
| SC | AV | 77881 |
| tempPT | AV | 101469 |
| tempPT2 | AV | 317953 |
| tempPT2 | SVC | 2830 |
| tempPT2 | SVD | 7 |
| tempSC | AV | 78305 |